Getting off the ground : the pioneers of aviation speak for themselves / George Vecsey & George C. Dade. Vecsey, George. Dade, George C., joint author. Aeronautics United States History. TL539 .V4 1979 629.13 B VEG Includes index. New York : Dutton, c1979. c1979. 1979 Text xiii, 304 p. : eng United States